单词：quartz sand
quartz sand的用法和样例：
例句
- Sludge reduction performance by earthworm biofilters using quartz sand and ceramsite as media was compared.比较了石英砂和陶粒滤料蚯蚓生物滤池的污泥减量化效果。
- It is necessary to conduct separation analysis prior to beneficiation of quartz sand.可选性分析是石英砂选矿前需要进行的必要手段。
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